package work.wk.Netty.DelimiterBasedFrameDecoder;

import io.netty.bootstrap.Bootstrap;
import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.ChannelOption;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.SocketChannel;
import io.netty.channel.socket.nio.NioSocketChannel;
import io.netty.handler.codec.DelimiterBasedFrameDecoder;
import io.netty.handler.codec.string.StringDecoder;


/**
 * Created by wangkai43 on 2017/7/14.
 */
public class EchoClient {

    public void connect(int port, String host) throws  Exception{
        EventLoopGroup group = new NioEventLoopGroup();
        try{
            Bootstrap b = new Bootstrap();
            b.group(group).channel(NioSocketChannel.class)
                    .option(ChannelOption.TCP_NODELAY,true)
                    .handler(new ChannelInitializer<SocketChannel>() {

                        @Override
                        protected void initChannel(SocketChannel socketChannel) throws Exception {
                            ByteBuf delimiter = Unpooled.copiedBuffer("$_".getBytes());
                            socketChannel.pipeline().addLast(
                                    new DelimiterBasedFrameDecoder(1024,delimiter)
                            );
                            socketChannel.pipeline().addLast(new StringDecoder());
                            socketChannel.pipeline().addLast(new EchoClientHandler());
                        }
                    });

            ChannelFuture f = b.connect(host,port).sync();

            f.channel().closeFuture().sync();
        } finally {
            group.shutdownGracefully();
        }
    }

    public static void main(String[] args) {
        int port = 8080;
        String host = "127.0.0.1";
        if(args!=null && args.length>0){
            try{
                port = Integer.valueOf(args[0]);

            }catch (NumberFormatException e){

            }
        }
        try {
            new EchoClient().connect(port,host);
        } catch (Exception e) {
            e.printStackTrace();
        }


    }
}
